django – Rest Framework教程IntegrityError创建片段

概述我正在通过Django Rest Framework教程工作,我被困在第4部分. 在为视图添加权限后,它会说创建几个片段.我通过可浏览的API登录并尝试发布这样的代码段： {"title": "snippet","code": "print 123"} 当我这样做时,我得到： / snippets /中的IntegrityError NOT NULL约束失败：snippets_snippet 我正在通过Django Rest Framework教程工作,我被困在第4部分.

在为视图添加权限后,它会说创建几个片段.我通过可浏览的API登录并尝试发布这样的代码段：

{"Title": "snippet","code": "print 123"}

当我这样做时,我得到：

/ snippets /中的IntegrityError

NOT NulL约束失败：snippets_snippet.owner_ID

谁知道这里发生了什么？

Traceback:file "/home/grez/restenv/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response  111.                     response = wrapped_callback(request,*callback_args,**callback_kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/django/vIEws/decorators/csrf.py" in wrapped_vIEw  57.         return vIEw_func(*args,**kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/django/vIEws/generic/base.py" in vIEw  69.             return self.dispatch(request,*args,**kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/rest_framework/vIEws.py" in dispatch  403.             response = self.handle_exception(exc)file "/home/grez/restenv/lib/python3.4/site-packages/rest_framework/vIEws.py" in dispatch  400.             response = handler(request,**kwargs)file "/home/grez/web/resttutorial/snippets/vIEws.py" in post  23.             serializer.save()file "/home/grez/restenv/lib/python3.4/site-packages/rest_framework/serializers.py" in save  599.             self.save_object(self.object,**kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/rest_framework/serializers.py" in save_object  1041.         obj.save(**kwargs)file "/home/grez/web/resttutorial/snippets/models.py" in save  36.         super(Snippet,self).save(*args,**kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/base.py" in save  591.                        force_update=force_update,update_fIElds=update_fIElds)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/base.py" in save_base  619.             updated = self._save_table(raw,cls,force_insert,force_update,using,update_fIElds)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/base.py" in _save_table  700.             result = self._do_insert(cls._base_manager,fIElds,update_pk,raw)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/base.py" in _do_insert  733.                                using=using,raw=raw)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/manager.py" in manager_method  92.                 return getattr(self.get_queryset(),name)(*args,**kwargs)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/query.py" in _insert  921.         return query.get_compiler(using=using).execute_sql(return_ID)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in execute_sql  920.                 cursor.execute(sql,params)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/backends/utils.py" in execute  81.             return super(CursorDeBUGWrapper,self).execute(sql,params)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/backends/utils.py" in execute  65.                 return self.cursor.execute(sql,params)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/utils.py" in __exit__  94.                 six.reraise(dj_exc_type,dj_exc_value,traceback)file "/home/grez/restenv/lib/python3.4/site-packages/django/utils/six.py" in reraise  549.             raise value.with_traceback(tb)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/backends/utils.py" in execute  65.                 return self.cursor.execute(sql,params)file "/home/grez/restenv/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py" in execute  485.         return Database.Cursor.execute(self,query,params)Exception Type: IntegrityError at /snippets/Exception Value: NOT NulL constraint Failed: snippets_snippet.owner_ID

解决方法 我今晚正在阅读本教程并遇到同样的错误.看来教程是一个版本左右的实际框架可能呢？无论如何,经过一些研究后,我能够获得片段保存.

教程说这样做的地方：

def perform_create(self,serializer):    serializer.save(owner=self.request.user)

我改用这个：

def pre_save(self,snip):    snip.owner = self.request.user

似乎perform_create方法不再存在或被调用,因此所有者永远不会被设置,因此我们看到了错误.我不确定我所做的是解决问题的正确方法,但似乎有效！

这是我在上面提到的文档的链接：http://www.django-rest-framework.org/api-guide/generic-views/#genericapiview

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